带理解的格式化打印

问题描述

我正在尝试使用理解和打印格式打印列表列表。

all_students = [
    ["Joe","John","Mary"],["Tina","Tony","Jeff","Béla"],["Pete","Dave"],]

print("\n".join("group {0},size of group: {1},students: {2}"
                .format(idx+1,len(element),*element) for idx,element in enumerate(all_students))
)

输出：

group 1,size of group: 3,students: Joe
group 2,size of group: 4,students: Tina
group 3,size of group: 2,students: Pete

预期结果：

group 1,students: Joe,John,Mary
group 2,students: Tina,Tony,Jeff,Béla
group 3,students: Pete,Dave

我在代码中做错了什么？无法解决

解决方法

直接替换

.format(idx+1,len(element),*element)

与

.format(idx+1,",".join(element))